a couple things.
your not gonna find a standalone for 600 bucks besides maybe megasquirt. which is not the best, but its ok.
second of all, rising rate regulators are crap. get an AF controller. and dont buy a narrow band AF guage. they are worse than useless because they cost money. if they were free they would just be useless.
third of all, if your turboing, why do you even think the stock injectors are good enough? get some bigger ones. RC engineering or Deatschwerks can both help you immensely if you need to know how big and what kind to use.